The expression is .
Apply distributive property: (b + c) a = ba + ca.
(Distribute 12)
(Multiply: )
The solution of .
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![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=813be6320d653d43f58c4fe82be443fa.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=94dc329b30326b5cc41eee5bd2b973ed.png\")
(Distribute 12)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=32ba85bba046feee0e8b5b21de3db189.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b975852608c0713025be67910efe0b94.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f1e58d1f109af3ee55cbacc550a5ce1f.png\")
.